Bolt-anchorage.



F. R. W. GLEVERDON & J. DE TEMPLE.

BOLT ANCHORAGE.

APPLIoATIoN HLED MAY 15, 190e.

Patented Mar. 2, 1909.

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FREDERICK R. W. CLEVERDON, OF NEW ROCHELLE, AND JOSEPH DE TEMPLE, OF

NEW YORK, N. Y.

To all whom it may concern:

Be it known that we, FREDERICK R. W. CLEvERnoN and JOSEPH DE TEMPLE, citizens of .the United States, residing, respectively, at New Rochelle, county of N estchester, and State of N ew York, and thecity, county, and State of New York, have invented certain new and useful Improvements in Bolt-Anchorages, of-which the following is a full, clear, and exactdescription. i

This invention relates to anchorages for bolts which are received in a wall or ceiling of concrete or similar material, for the purpose of securing wooden beams and other objects firmly in placethereon.

The invention'ls most particularly adapted for use with concrete piers and sea walls, although the use is in no sense restricted to these constructions.

It is the urpose of the inventionto rovide a very rm fastening or anchorage w `lich is ad pted rfor use with bolts of different lengtffs, and which imparts great lateral rigidity to the bolt as well as resistance against longitudinal strains. We make use of certain castings or fixtures which are assembled together by intermediate sections of ordinary gas' pipe, said sections being threaded into the fixtures or castings in a manner similar to the use of ordinary pipe couplings. Two styles of fixtures or castlngs are employed, one of which is adapted to resist on itudinal displacement strams on the bolt, am? the other of which imparts a transverse rigidity thereto. -These fixtures or castings are assembled `together into a unitary structure by connecting sections of gas pipe so as to form a complete, water-tight chamber in which the bolt is received. On account of the water tight character of this chamber in which the bolt is received, it is evident that the latter is always freely removable. Not only is the concrete ke t away from the threads of the bolt, but a l moisture and salt water is also excluded, so as to even prevent oxidation. It is important in practice to have the bolts freely removable in case of repair of the structure and also in case the bolt as its head broken off. Without this freely removable characteristic of the bolts,it would b e necessary to blast out the entire anchora e in orderto make any change or repairs. It desired, the bolt receiving chamber can be packed with grease or paraffin to further protect the bolts from oxidation.

Specification of Letters Patent. Application filed May 16,

Patented March 2, 1909. 1908. serial No. 433,023.

The invention consists in the features of i construction and combination hereinafter set forth and 'shown and finally particularly l pointed out in the a pended claims.

In the drawings: igure 1 is a side elevation of a bolt anchor embodying 'the princil ples of this invention, embedded 1n a concrete f wall; Fig. 2 is a vertical sectional view of the l' same; Fig. 3 is a section on the line :v x of l Fig. 1, showing the form of the upper fixture or casting, and Fig. 4 is a section on the line fy-y of Fig. 1, showing the form of the lower fixture or casting.

Referrin to the drawings, in which like parts are gcsignated by the same reference sign', 1 indicates afixture, casting, or member [havmg a flange or enlargement 1 and a threaded bolt-receiving portion 1b. The member 1 is conveniently made of cast iron of generally cylindrical outline with an interior chamber or cavity also of cylindrical outline and reduced or restricted in diameter at its middle portion 1b, where it is internally threaded to receive the bolt. Near its outer edge this chamber or cavity is additionally threaded at 1C to receive a gas ipe of a size large enough to inclose the bolt used. The flange or enlargement 1a may be of any desired form, but is preferabl a comparatively heavy square or rectangu ar plate integral with the body.-1 and extending in a plane transverse to the axis thereof. This form of enlargement becomes very rmly embedded in the surrounding mass of concrete and resists strains against longitudinal displacement with great efficiency. In additlon to the fixture or member 1, there is an entirely separate member 2 which is also preferably made of cast iron of generally cylindrical outline. This member has a longitudinal, generally cylindrical interior c avit with a reduced or restricted portion-2u whicfi is internally threaded to receive the bolt.

2b designates ribs which are integral with the body 2 and extend outward in a series of vertical, radial, spaced-apart planes from the surface thereof. Four shown, projecting in directions at right angles to one another.

The cavity of the member 2 is internally threaded at its ends 2c and 2d to receive an ordinary gas pipe or pipes of the size already mentioned in connection with j .the inner xture 1. 3a and 3b designate the sections of this pipe, properly assembled on the memof these ribs 2b areA bers 1 and 2, so as to form a complete anchorage for a bolt 4. The length of the pipe sections 3* and 3"` 's, of course, made to accord to the particular workat hand and to the dimensions of the bolt used.

In use the members 1 and 2 are assembled upon the pipe sections 3a and 3b and embedded in the'concrete or other wall or masonry 5 in the desired locations. The bolt should be in place when the device is assembledA m the concrete, in order that the threads of the two anchorage portions shall be in proper relation to one another. The bolt may be removed as soon as the concrete has set, and is certain to enter the threads of both anchorage portions pro erly thereafter. The bolts 4 are then passe through the beams or other objects 6 to be secured, so that they extend inwardly through the threaded portions 2a and 1b of the respective anchorage fixtures 1 and 2. The inner fixture 1 is adapted to resist any longitudinal displacement strains which are imposed upon the bolt, and the outer fixture 2 is adapted to resist any transverse forces which may be applied to thel bolt due to the wei ht of the beams or any other similar latera ly acting forces. Each of the fixtures is formed exclusivelyfor its particular work, and the location of each fixturefis based on its particular function, since in each case an adequate mass of concrete is presented in the path ofthe particular strains to be resiste v An additional feature of the invention lies in the means by which the device is made perfectly water-tight in use. For this purpose the upper or outer pipe section 3b is reamed into a sharpv edge -7 which projects slightly above the surface 8 of the concrete. When the beam 6 is screwed in place, this sharp edge cuts into the wood and establishes a water-tight joint therewith. As the bolt heads are ordinarily countersunk or embedded in pitch or similar material 9, it is evident that ingress of water to the interior of the bolt anchorage is absolutely cut off.

What we claim is: 1. A bolt anchorage comprising two separate, internally-threaded fixtures and a pipe section rigidly connecting the same with their threaded portions in alinement with one another.

2. A bolt anchorage comprising a bolt, a pipe section, a fixture having an interior chamber or cavity internally threaded to receive said bolt and also threaded to receive said pipe section, said fixture havingl a iiange or enlargement in a plane transverse to the axis of its threaded portions.

3. A bolt anchorage comprising a bolt, a pipe section, a fixture of generally cyhndrical outline and having an interior cavity threaded near its outer` end to receive said pipe section and having a reduced or restricted ortion internally threaded 'to receive sai bolt, said fixture having a flange or enlargement in a axis of its bolt-receivmg threaded portion.

4. A bolt anchorage comprising a fixture, a bolt, pipe sections, having a flange or enlargement and internally threaded at different portions to receive one of said pipe sections and to receive said bolt, and a se arate fixture having radial ribs and threade to receive said bolt, said second fixture also having two internally-threaded portions to receive the other of said pipe sections.

5. In combination, a fixture internally threaded to receive a j bolt and having a fiange or enlargement, a second fixture internally threaded to receive a bolt and having axially-extending ribs, a ipe section joining said fixtures with their olt-receiving portions in alinement with one another, and a second pipe section projecting from said second fixture in alinement with the first.

6. A bolt anchorage comprising fixtures internally threaded to receive a bolt, a pipe section joining said fixtures, and a second ipe section projecting from the outermost ture and h aving a sharpouter edge, wherelane transverse to the by a wooden object to be clamped makes a 

